Images in A Century of Variable Star Observing: 1911-2010

July 2011: AAVSO charts

a) T Her finder chart distributed by William Tyler Olcott 1911;

b) SS Cyg field photo with sequence stars marked and measured;

c) S Vir chart with lettered sequence and measured values;

d) S Vir blueprint standard chart 1912;

Click here to access the Variable Star Plotter (VSP)